Transition metals (Co, Cu) as additives on hydrothermally treated Tio 2 for gas sensing

Ana M. Ruiz, Albert Cornet, Kengo Shimanoe, Joan R. Morante, Noboru Yamazoe

研究成果: Contribution to journalArticle査読

61 被引用数 (Scopus)

抄録

Titania-supported Cu or Co nanoparticles have been prepared with loading of 0.5 wt.% and have been tested for the detection of CO. Characterization with XRD showed that Cu and Co did not change appreciably the titania grain size. However, the anatase-to-rutile phase transformation was promoted. XPS results manifested a conspicuous coating of the additives on the TiO2 surface, and suggested chemical states of values 0 and +2 for Cu at 600 and 800 °C respectively, and +2 for Co at both calcination temperatures. The evaluation of the gas sensing properties highlighted an adequate n-type response to CO for the Cu-TiO2 and Co-TiO2 materials calcined at 600 °C, while the response of the same materials calcined at 800 °C was diminished and exhibited a p-type characteristic, which could be related to the formation of a inversion layer localized in the surface.

本文言語英語
ページ(範囲)7-12
ページ数6
ジャーナルSensors and Actuators, B: Chemical
109
1
DOI
出版ステータス出版済み - 7 24 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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